Патент USA US2411079код для вставки
Nov. 12, 1946. G. H. J. BAULE 2,411,079 METHOD OF ATTACHING SUTURES TO SHANKS OF SURGEQNS’ NEEDLES Filed Sept. 9, 1944' I _ éilillllllll’l’lliii 4 551211,], I‘ INVEN TOR.‘ . A TTOR/VEYJ. 2,411,079 Patented Nov. 12, 1946 UNITED STATES PATENT OFFICE 2,411,079 METHOD OF ATTACHING SUTURES TO SHANKS OF SURGEONS’ NEEDLES Gerhard H. J. Baule, Salina, N. Y. Application‘ September 9, 1944,~Serial No. 553,394 1 Claim. (Cl. 128--339) 1 . 2 . This invention relates to surgeons’ needles and has for its object a method of attaching cords or sutures to the shanks of needles leaving a maxi the maximum diameter of suture must not be un duly weakened so that the needle breaks when being used. The breakage of needles, which are mum amount of metal in a shank of minimum di ameter with a suture of maximum diameter, thus of but a few thousandths of an inch in diameter, has heretofore been not an uncommon occurrence and sometimes is the rule rather than the excep tion. producing a shank of maximum strength and minimum outer diameter with the suture of maxi mum diameter anchored therein. This method of attaching sutures to the shanks ' of needles includes expanding an outer end por tion of the shank to a larger diameter than the adjacent inner portion; forming a blind axial recess in the shank of substantially the diame ter of the suture to be attached thereto, the recess The invention consists in the method and steps hereinafter set forth and claimed. ' In describing this invention, reference is had to the accompanying drawing in which like charac ters designate corresponding parts in all the views. extending through the expanded portion and well into the unexpanded portion of the shank; plac I‘ Figure 1 is an elevation, partly in section, on an enlarged scale, of a needle with suture or cord ing the suture in the recess and contracting the expanded portion, so that its inner diameter is less than the suture and its outer face substan Figure 2 is an elevation of the shank of the nee tially flush with the outer face of the unexpanded dle, partly in section on a greatly enlarged scale illustrating the enlarging or expanding of the 20 portion of the shank. The axial recess may be partly formed before the outer portion of the outer end portion of the shank. . shank is expanded and completed after the ex Figure 3 is a sectional view illustrating the com panding operation or may be completely formed plete formation of the blind axial recess in the attached. . expanded portion and the adjacent unexpanded portion of the shank with the recess of substan tially the diameter of the suture to be attached, 25 after the expanding operation. I designates the needle; 2 the shank thereof, and 3 the cord or suture attached thereto. In Figures 2 and 3, the outer. end portion] of the omitted, of tapering the walls of the entrance or shank is expanded before the blind recess is mouth of the recess into a funnel shape extend formed. It may be expanded in any suitable ing from an intermediate point in the bore of the 3o manner, as by applying an axial compressing expanded portion to the outer end of the shank. force to this shank while holding the inner end Figure 4 is a view similar to Figure 2 illustrat portion 5 of the shank from expanding and con ing a slight modi?cation of the method, wherein trolling the expanding of the outer end portion 4 an axial bore is formed before the expanding op— by means of suitable dies, this being something of eration but the blind recess not completed until forging operation. The end of the shank is 35 aprovided after the expanding operation. with a centering hole 6 for facilitating Figure 5 is a. view showing the shank after the drilling operations. After the shank is formed expanding operation is performed on the shank up, as shown in Figure 2, a blind recess ‘I is drilled shown in Figure 4. out, the diameter thereof being substantially that Figure 6 is a view similar to Figure 5 showing 40 of the suture 3, so that the suture ?ts the recess the completion of the blind recess with its walls when inserted therein. The expanded portion is Figure 3 also showing another step which may be ' machined out throughout the length thereof to the diameter of the suture. Figure 7 illustrates the forming of the funnel shaped mouth for the expanded portion of the ‘ recess shown in Figure 6. Figures 8 and 9 are views similar to Figure 1 of then contracted, so that its internal diameter is _ less than that of the suture and its peripheral sur face substantially ?ush with the peripheral sur face of the inner unexpanded portion 35 of the shank, so that a head 8 is provided at the inner end of the ‘suture, ?tting the inner end portion of the recess and anchoring the suture in the re cess. The suture, when placed in the recess, is modi?ed forms of the needle produced by this method. It will be understood that surgeons’ needles are 50 inserted as far as or to near the inner end wall necessarily of extremely small diameter, and the which bounds the recess. For the purpose of suture must be ?rmly attached thereto and that preventing lateral bending or breaking strains at when the suture is attached thereto, the shank' right angles to the axis of the suture when .pull must be smooth or free from comers or crevices, ing force is applied to the needle and suture with and also that the shank of minimum diameter for 55 the needle turned at an angle to the suture, the 3 2,411,079 entrance end of the recess is formed conical or beveled or tapered, as at 9 (Figure 3), the conical or tapering portion starting from a point midway between the ends of the bore of the expanded por tion, and ?aring outwardly toward the outer end of ‘the expanded portion. When the expanded portion is contracted onto the suture, the walls of this entrance or conical portion are also con 4 force applied to the interior of the outer end por-. tion of the shank in which the partly completed blind recess is pre-formed. . In any form of the invention, a portion of the shank is expanded into a diameter greater than its original diameter and this portion contracted after being formed with a blind recess, into a diameter less than the diameter of the suture and tracted to fit onto the suture, as shown in Figure with its peripheral surface back into its original 1, and also in Figures 8 and 9. 10 diameter, so that it is ?ush with the adjacent por As seen in Figures 4, 5, 6 and 7, the shank 2 tion of the shank. Thus, a suture is ?rmly may be ?rst formed with an incomplete blind anchored to the needle without unduly weakening recess Ill, and then the outer portion 4 of the the needle, that is, removing a minimum of metal shank expanded and the blind recess 1 com to form the blind recess, and also owing to the pleted by boring it out to a diameter substantially 15 contracting of the expanded portion, the recess that or the suture. The suture is then inserted may be so formed, as not to require grinding and in the recess and the expanded portion contracted minute ?tting of the suture to fit the recess, and into a diameter-less than the suture. The en as these sutures are practically a. thread, this tranceend of the recess is also tapered at 9 so feature is a great desideratum in the production that the resulting joint is the same as that shown 20 of surgeons’ needles with the sutures attached. in Figure 1. Also, the needles may be formed of minimum In Figure 8, a modi?cation of the joint between diameter with the maximum amount of metal an the shank and the suture is shown, in which the with the suture of maximum diameter. ‘ shank is ?rst formed with a cylindrical blind What I claim is: _ recess and then expanded into conical form with 25 The method of attaching sutures to the the larger diameter at the outer end of the shank, shanks of surgeons’ needles including expanding making the recess conical, the conical recess then the outer butt end cylindrical portion’ only of the bored out substantially cylindrical to the diam needle shank radially to a larger diameter than eter of the suture; the suture inserted, and the the remaining portion, boring a blind axial outer conical portion contracted onto the suture 30 cylindrical recess in said outer end portion of the to its outer original diameter, thus forming the - shank through the expanded portion and into recess conical with its end of smaller diameter the adjacent unexpanded portion of the shank, toward the outer end of the shank, all as de the recess being of substantially the same diam scribed in connection with Figures 4, 5, 6 and '7, eter as the'suture, whereby the cylindrical wall or the solid shank may be expanded or upset into 35 of the portion of the recess in the unexpanded conical form with the end of larger diameter ‘at portion of the shank adjacent the expanded por the outer end of the shank, and the recess bored tion is of less thickness than the wall of the recess out to substantially the diameter of the suture; in the expanded portion; placing the suture in the 'the suture inserted and the conical portion con recess approximately to the inner end wall of the tracted, as described in connection with Figures 40 recess and contracting the expanded portion 2 and 3. radially onto the suture, so that the inner diam In Figure 9, the initial expansion is conical, as eter of the contracted portion is less than that of described in connection with Figure 8, but to a the normal diameter of the suture and so that greater diameter than in Figure 8 and the wall of v the outer face of the now contracted portion is the bore bored out in a plural number of steps of 45 ?ush with the outer face of the adjacent unex different diameters. Thus, when the expanded panded portion of the shank, whereby the portion portion is contracted to its original external of the suture in the inner end portion of the diameter and its internal diameter to less than the recess provides an anchoring head for the suture diameter of the suture, the suture is contracted and thevwall of the contracted portion is thicker at a plurality of points or rings. 50 than the wall of the inner end portion of the In the form shown in Figures 4 and 5, the piece recess, and provides an internal collar against is expanded from the form shown in Figure 4 to which the head pulls. that shown in Figure 5 by a radial expanding GERHARD H. J. BAULF‘.